It构成的句型小结
It的用法及典型句型归纳. 个人总结
It的用法及典型句型归纳一、人称代词it的最基本用法是作代词，主要指刚提到的事物，想法，以避免重复;也可以指性别不明或性别被认为是不重要的人或动物；未指明但谈话双方都明白的事情或情况。
①They watched the train until it disappeared in the distance.②Is this your dog？No, it isn’t.③I hate it when people talk with a full mouth.．二、.非人称代词.it有时并不指具体的东西而泛指天气、时间、日期、距离、价值、度量、温度、环境等：It is a lovely day, isn’t it? // It was nearly midnight when she came back.It is April First today. // It is some 3000 kilometers from A to B.It is three dollars. // Today it is 30 degrees centigrade.三、作形式主语，替代主语从句，动词不定式，或动名词短语1.作形式主语替代主语从句⑴It is clear ( obvious，true，possible，certain....) that＂┅清楚的（显然的，真的，可能的,肯定的．．．）＂⑵It is important ( necessary，right，strange，natural...) that + (should ) do (虚拟语气)┅是重要的(必要的,对的,奇怪的,自然的┅)⑶It is said (reported/ learned/believed/thought/known/told/hoped.....) that= sb / sth is said (reported/ believed /thought…) to do( to be doing/ to have done) sth＂据说（据报道，据悉．．．）＂。
it做主语的句型
IT 作为主语的句子类型主要包括以下几种：1. 一般陈述句：例如：IT is a beautiful day.（今天是个美好的一天。
）2. 疑问句：例如：What about IT?（怎么样？）3. 否定句：例如：IT isn't working.（它没在运作。
）4. 祈使句：例如：IT needs fixing.（它需要修理。
）5. 感叹句：例如：How amazing IT is!（多么惊人啊！）6. 一般疑问句：例如：Does IT work?（它运作吗？）7. 特殊疑问句：例如：Which IT do you mean?（你指的是哪个？）8. 选择疑问句：例如：Do you want IT or that one?（你要哪一个，这个还是那个？）9. 被动句：例如：IT is being repaired.（它正在被修理。
）10. 宾语从句：例如：I think IT is a good idea.（我认为这是个好主意。
）11. 状语从句：例如：However IT happens, we should be prepared. （无论怎样，我们都应该做好准备。
）12. 名词性从句：例如：IT is obvious that he is talented.（他很天赋。
）13. 条件句：例如：If IT rains, we will stay indoors.（如果下雨，我们就在室内活动。
）14. 虚拟语气：例如：What would IT be like if IT were summer? （如果现在是夏天，它会是什么样子？）15. 比较级和最高级：例如：IT is the best solution.（这是最好的解决方案。
）16. 倍数表达：例如：IT costs twice as much as that.（它的价格是那个的两倍。
）17. 并列句：例如：IT rains and snows simultaneously.（雨和雪同时下。
it的句型
It句型--高考重点It 引导的句型虽不是高考的热点，但近三年全国各省市试题中经常出现，我们不能疏忽。
考查的重点主要有三个方面：1.it引导的强调句型；2. it作形式主语或者形式宾语；3. it 和since、before、when等连用。
为了提高同学们的应变能力，现对it引导的一些常见句型归纳和总结如下：1。
It + be + 时间+ since-clause主句多用一般现在时，从句用一般过去时，如果表示过去的情况，主句用一般过去时，从句用过去完成时，或主句用过去完成时，从句用一般过去时。
It is three years since his father passed away . (从现在算起)It was 10 years since they married . (从过去算起)It had been fifteen years since she left Shanghai . (从过去算起)30 years has passed since we joined the Party . (从现在算起)2. It + be + 时间+ before-clause这句型中的时间一般为表示一段时间的词语(如：long years , months , weeks , days ,hours , minutes ) ，主句中的谓语动词用肯定式，意为"过多长时间才......"。
主句的谓语动词是否定式时，意为"没过多长时间就......"、“不久就……”。
主句的时态可用过去时was/wasn’t或将来时will be/won’t be；用was 时，before从句的动词用一般过去时；用will be 时，before 从句常用一般现在时。
It was not long before she learned those poems by heart . 她没过多久就背会了那些诗歌。
（完整版）It的用法总结
（完整版）It的用法总结It的用法总结在英语中,it有许多不同的用法,它既可以用作代词(如人称代词、非人称代词)，也可以用作引导词（作形式主语或形式宾语），还可以用来构成强调句型。
.it用作代词(1) 用作人称代词在句子中作主语或宾语；指前面已经提到过的事物、动物或人，且it指特定的事物；如果指前文中提到的事物中的任何一个，用one。
one可以与any, each, every, not等连用，但one 不可代替不可数名词。
—where’s your car?—it’s in the garage. 你的汽车在哪儿呢？在车库里。
(指代物品your car)did you hit it? 你打中了吗？ (指代事件)the baby cried when it was hungry.这婴儿饿时就哭。
（指代婴儿，尤指性别不详或无所谓时）—who is that?—it’s me. 是谁？我。
(指一定情景中所确定的人或事物，此时相当于指示代词，代指this和that,有时也指人)—what’s this?—it’s a box. 这是什么？一只箱子。
(2) 作非人称代词表示天气、日期、时间、温度、距离、价值、路程、度量、自然现象与环境等。
也可模糊地指一般情形或上文的部分或整个意思。
译成汉语时，it通常不一定译出来。
it’s a long time since they left. 他们走后很久了。
it’s two miles to the beach.离海滨有两英里远。
that’s just it—i can’t work when you’re making so much noise.原因就在这里——你弄出这么大的声音，我工作不了。
另外，需要注意两点：（1）“it’s time…”后面可以接不定式和介词短语表示“是做……的时候了”。
如：it’s time for supper. it’s time to have supper.(2) “it’s time…”后面还可以接一个从句，但是从句中的谓语动词一定要用过去式即虚拟语气，如：it’s time we had lunch.是我们吃饭的时候了。
it作形式主语的句型
it作形式主语的句型
1、It + be + 形容词 + that从句：表示某事物具有某个特征或属性。
例如：It is important that we arrive on time.（我们按时到达很重要。
）
2、It + be + 名词短语 + that从句：表示某个事物符合某个特征或属性。
例如：It is a shame that he didn’t come to the party.（他没来参加聚会真是遗憾。
）
3、It + be + 过去分词 + that从句：表示某个动作已经被完成或已经发生。
例如：It is said that the book will be published next month.（据说这本书将在下个月出版。
）
4、It + be + 现在分词 + that从句：表示某个动作正在进行或正在发生。
例如：It is raining hard outside.（外面正下着大雨。
）
5、It + be + 不定式短语 + that从句：表示某个动作将要发生或被计划。
例如：It is to be announced tomorrow if the meeting will be held as scheduled.（明天将宣布会议是否按计划举行。
）
这些句型中的“it”通常被称为“形式主语”，因为它在句子中充当主语，但实际上并不是真正的主语。
这种用法是为了使句子更加通顺或强调某种特定的信息。
it的9个常用特殊句型
含it的9个常用特殊句型1. It appears/ happens/ seems/ says that…It seems that he is always correct. 他好像总是对的。
It happened that I had no money with me. 碰巧我当时没有带钱。
2. It is said/ reported/ believed/ understood that…It is said that he has joined the Party. 据说他已经入党了。
3. It doesn’t matter…It doesn’t matter what he says. 他说什么都没关系。
4. (It is) no wonder( that) …It’s no wonder he is not hungry; he has been eating sweets all day. 难怪他不饿，他整天在吃糖果。
5.It is a waste of time /money doing sth.It’s a waste of time your talking to him. 你和他谈是浪费时间。
6. It makes no/mush difference…It’s doesn’t make much difference my being there. 我在不在那儿没有什么影响。
7. it takes sb. some time to do sth.It took me nearly an hour to work out the problem. 花了我差不多一个钟才做出那道题.8. It’s one’s turn to do sth.It’s my turn to clean the classroom. 是轮到我打扫教室的了。
9.If it were not for…If it were not for your help, I would still be homeless. 若不是你帮忙，我现在还是无家可归。
It的用法及句型总结
It的用法及句型总结"It" 用法及其句型和固定搭配，是高中英语语法的重点、难点，又是近几年高考的热点，因此应给予充分的重视，现将it用法归纳如下：一、It用作实词表达以下概念:指代前文提到的事物，如前文中的this, that；替代前文中的内容；指代一位性别不明的小孩或未知的人；指代未指明但谈话双方都知道的那件事；指代时间、天气、气候、距离等自然现象……二、It用作形式主语替代作主语的从句、动词不定式、动名词，而把真正作主语的从句、动词不定式、动名词置于句尾。
It 作形式主语的常见句型：1. 代作主语的动词不定式，其句型为:(1) It be adj. (for sb.) to do sth.此处adj. 通常为描述事件的形容词：easy, difficult, hard, necessary, unnecessary, possible, impossible, likely, unlikely, right, wrong, important, unimportant, legal, illegal, well-mannered, ill-mannered, polite, impolite, clear, obvious, certain, suitable, proper, fit, useful, useless, dangerous…例: It is illegal (for a teenager) to drive a car without a license.(2) It be adj. of sb. to do sth.此处adj. 通常为描述人的形容词：kind, unkind, nice, rude, cruel, considerate, thoughtful, thoughtless, careful, careless, silly, foolish, stupid, clever, wise, crazy.例: It's kind of you to help me with the problem.(3) It替代作主语的动名词的常见句型:It's no good/use doing…It's (well)worth doing…It's (well)worth on e's while doing/to do…It's (well)worth while doing/ to do例: It's no use crying over spilt milk（覆水难收）.2. It替代作主语的从句常见句型：(1) It is + noun +从句例: It is no secret that the president wants to have a second term at office.(2) It is adj. +clauseIt's surprising that… (should)………竟然……It's a pity/shame that…(should)………竟然……例: It's important that you should apologize to her for your rudeness.(=It's of much importance that you should apologize to her for your rudeness.)(3) It verb sb. + clause= It is v-ing + clauseIt+surprise/delight/interest/disappoint/worry/disturb/annoy/amaze /bother/conc ern/frighten/please/anger sb. that…例: It worried me that she drove so fast.(= It was worrying that she drove so fast.)(4) It verb (to sb.) that…= sb/sth verb to do例: It (so) happened/chanced that they were out.(= They happened/chanced to be out.)(5) It is v-ed that…=sb/sth is to do(verb=say, report, think, believe, hope, expect, agree, accept, decide, determine, intend, plan, understand, know）例: It is said that the couple have gotten divorced.(=The couple are said to have gotten divorced.)(6) It is v-ed that … (should)…(verb=demand, request, require, order, suggest, advise, recommend例 It is suggested that they should begin with the third question.三、It作主语的句型1. It takes sb. … to do…(=sb takes…to do…)某人用多长时间做某事例: It took the men a week to mend our roof.(= The men took a week to mend our roof.)2. It's (just)(un)like sb. to do…（不）像某人做某事的风格例: It was (just) like him to think of helping us.3. It's (about/high) time that… should /v-ed…是该做某事的时候了例: It's(about/high) time that we should take action.4. It's the x-th time (that) … have v-ed…第几次做某事了例: It's the third time that he has failed the driving test.5. It is/has been… since …continuous v-ed(延续性动词) 某动作持续了多长时间例: It's 10 years since he lived here6. It was(not)… before…过(不)了多长时间某动作发生了例: It was not long before they arrived.四、It 作形式宾语用来替代作宾语的从句、动词不定式、动名词，而把真正作宾语的从句、动词不定式、动名词置于句尾。
四.It的句型
It的句型it常用在以下句型中：1.It is ＋时间段＋since ＋主语＋did“自从……以来已有一段时间”。
2.It is/was difficult/ easy/ necessary/ important It is/was (a/an) pleasure/ pity/ shame/ funIt appears/seems/looks certain /is said that Sb.+think/ make/ find it +adj to do /that3.形式主语it：be+形容词+不定式It’s better to be early. be+名词+不定式It was his duty to take care of you.be+介词短语+不定式It’s beyond me to say why. It + 及物动词+宾语+不定式It makes me sick to do it.be+名词+动名词It’s no good standing here in the cold.be + 形容词+动名词It’s helpless trying to persuade her.其他结构+动名词It doesn’t matter waiting a few more days.4.用于由that 引导的主语从句，有下面几种类型：it +be+形容词+that从句：It is natural that they should have different views.it +be+名词+that从句: It’s a shame that you’re sick.it +动词（+宾语）+that从句( happen, turn out, appears等)It happened that she wasn’t in that day. It never occurred to me that perhaps she was lying.It+动词的被动语态(said/believed/thought/expected/reported/known/announced/decided/learned/ expected/arranged/suggested…+that从句It’s said that there has been an earthquake in India.5.It 代表that引导的从句：I took it for granted (that)认为理所当然you would be coming.6.It代表连接代（副）词引导的从句：He hasn’t made i t clear when he is coming back.They haven’t made it known where the meeting is to take place.7.it跟从句用法：1）it +be+形容词+从句：It is not clear to me why he behaved like that. (obvious, necessary，right，strange，natural, true…) 注意两种句型：It’s easy (difficult, hard, important, possible, impossible,comfortable, necessary, better; the first, the next, the last,the best, too much, too little, not enough) 后加for sb. to doIt’s kind (nice, stupid, rude, clever, foolish, thoughtful,thoughtless, brave, considerate (考虑周到的), silly,selfish (自私的) )后加of sb. to do2）it +be+名词+从句: It’s a puzzle how life began.（a fact, a shame, an honor, no wonder…）3）it +动词（+宾语）+从句It doesn’t matter much where we live.4）it +动词的被动语态+从句It is not decided who will edit it.5）it +动词be +that从句No, it couldn’t be that they were interested in him.6）It +be + 一点时间+ when…It was Christmas Eve when I got the news of his being killed in a car crash. 7）It +be+一段时间+ since…It is/has been three week since I last heard from him. 8）It is time to do/ that…(谓语用过去时态）It is time for us to give the house a cleaning. It is time that we gave the house a cleaning.9）It + be + the first/second time that… (谓语动词用完成时态）It is the first time in history that two Nobel Prizes have been awarded to the same person.10）It takes sb. t ime to do…It took Mary 20 minutes to choose a suitable dress for the party.11)It 用于强调句陈述句It+动词be+强调部分+who(whom)/that+其他部分一般疑问句Is (was) it +强调部分+ that…?特殊疑问句特殊疑问词+is/was it that…？12）固定句型①④⑤⑥⑦⑧It + takes + sb. + some time +to do =sb. + spend + some time + (in) doing做某事花费某人多长时间”②It costs + sb. + some money +to do sth. cost + sb. + some money某人花费钱做某事sb. spend + some money + on + sth. sb. pay + some money + for sth. sb. buy + sth. + for + some money③It is + no use + 动名词eg.It is no good learning English without speaking English.能以动名词作主语的这类句子并不多，主要在以no good, no use, useless, worthwhile, 等词作表语的句子中用。
it为形式主语的句型
it为形式主语的句型好吧，今天咱们聊聊“it” 这个小家伙，它可真是个灵活的角色，尤其在英语里。
你有没有注意到，很多时候我们说的东西其实就是在用“it”来引导，嘿，听起来是不是挺神奇的？比如说，“It’s amazing how time flies.” 这句其实是在说，时间过得飞快，难道不是吗？生活就像一场马拉松，有时候你会感觉自己跑得飞快，有时候又像是慢吞吞的乌龟，嘿，这就是人生的味道。
再说说天气吧，大家都喜欢聊天气，这也算是“it”登场的好时机。
“It’s raining cats and dogs” 这句话一出来，大家都知道外面下大雨了，完全不用担心。
天气变化无常，今天还是阳光明媚，明天可能就乌云密布，真是让人摸不着头脑。
不过嘛，大家也乐在其中，毕竟没有谁能预测明天的天气，简直就像在抽彩票一样，刺激又好玩。
还有那种“it”后面跟着形容词的句子，比如“It's important to stay positive.” 这句你听着可简单了，但其实蕴含了很多道理，保持积极的心态就像在逆风飞翔，虽然会有点辛苦，但那种飞翔的感觉，真是太爽了！生活中的小麻烦，像是一只只小虫子，咬咬你、烦烦你，但如果你能保持乐观，那简直就是在给这些虫子下最后通牒，嘿，别惹我，我可是有超级能力的！再说说学习，大家常说“it takes time to learn a language.” 是啊，学语言就像攀登高山，起初可能觉得步履维艰，但慢慢的，你会发现山顶的风景简直美得让人窒息！就像这段时间我在学做饭，起初弄得一团糟，连水饺都包不好，哈哈！但是渐渐地，竟然能做出一两道拿得出手的菜，心里那个美呀，简直能飘到天上去！说到做饭，不得不提“it’s fun to try new recipes.” 试着做一些新菜谱，真的是一场冒险！有时候会惊喜，有时候会崩溃。
想象一下，食材在锅里翻滚，香味四溢，结果一不小心，盐倒多了，哎，整碗汤咸得跟海水似的，但不管怎么样，做饭就是乐趣无穷的过程，每次做出新花样，心里都像开了一朵花。
容易混淆的it的句型
3 It is/was+时间名词+when… (时间状语从句) 当我们到家时已是1点了. It was one o’clock when he got home. 4 It is/was +时间状语+that…(强调句) 我们是在1点回家的. It was at one o’clock that he got home. 5 It is the first time (that)… 我第一次到这来. It is the first time that I have been here. 6 It is time that….did/should do… 现在该是我们开始上课的时候了. It is time we began our class now.
容易混淆的it的句型归纳:
1 It is/has been+时间名词＋since ...did (时间状语从 句） 自从 … 以来,已是… 2 It is＋时间名词＋before… (时间状语从句） 要过…才… 3 It is/was+时间名词+when… 时间状语从句 当…时 4 It is/was +时间状语+that…(强调句) 5 It is the first time (that)…. 第一次… 6 It is time（ that）….did/should do… (定语从句） 该是… him in chess yesterday. It was the first time____ that I had won the game. that 8.Isn’t it time _____we took immediate action to fight against pollution now. 9.It is the very room ______I where used to study. that I used to study. 10.It was in the very room ____ that 11.It was at almost midnight ____he fell asleep. 12.It was almost midnight______ when he finished the work.
中考英语it的常考句型及知识点归纳(附练习题)
中考英语it的常考句型及知识点归纳（附练习题）一、it 作人称代词的用法1.指事物作为人称代词，it 可以除人以外的一切事物或动物。
如：I dropped my watch and it broke.我把手表掉在地上摔坏了。
It's hard work, but I enjoy it.工作很辛苦，可是我乐意干。
“Where is the dog?”“It’s in the bedroom. ”“狗在哪?”“在卧室里”。
2.指人it 指人主要用于指不性别不明的婴儿或用于确认某人的身份。
如：Is it a boy or a girl?是男孩还是女孩?There is a knock on the door. It must be the postman.有人在敲门，一定是邮递员。
【说明】在答语中，常用来指本人，如说It's me。
3.代替某些代词代词it 还可用于代替指示代词this, that 以及复合不定代词something, anything, nothing等。
如：“What's this?”“It's a new machine. ”“这是什么?”“是一种新机器”。
Nothing is wrong, is it?没出什么问题，是吗?二、it 作非人称代词的用法1.基本用法it 作非人称代词的用法，主要用于指时间、距离、价值、天气、气候及温度等自然现象。
如：It's too late to go there now.现在去那儿已经太迟了。
It rained all day yesterday.昨天下了一天的雨。
It can get very hot here.这里有时会很热。
2.用于某些句型It's time for sth.该做某事了。
It's time to do sth.该做某事的时候了。
It's time for sb to do sth.某人该干某事了。
It 构成的20句常用句型归纳
It 构成的20句常用句型归纳【句型1】It is + 被强调部分+ that ...该句型是强调句型。
将被强调的部分放在前面，其它部分置于that之后。
被强调部分可以是主语，宾语，表语或状语。
强调的主语如果是人，that可以由who换用。
如果把这种句型结构划掉后，应该是一个完整无缺的句子。
这也是判断强调句型与其它从句的方法。
【例】It was about 600 years ago that the first clock with a face and an hour hand was made.【例】It was they that (who ) cleaned the classroom yesterday.【例】It was in the street that I met her father.【句型2】It is not until + 被强调部分+ that ...该句型也是强调句型。
主要用于强凋时间状语，译成汉语＂直到．．．才．．．＂，可以说是not ... until ... 的强调形式。
【例】It was not until she took off her dark glasses that I realized she was a famous film star.= Not until she took off her dark glasses did I realize she was a famous film star.= I didn't realize she was a famous film star until she took off her dark glasses.【句型3】It is clear ( obvious, true, possible, certain....) that .....该句型中it 是形式主语，真正的主语是that 引导的主语从句，常译为＂清楚（显然，真的，肯定．．．）＂是主语从句最常见的一种结构。
与it有关的主要句型
与it有关的主要句型it强调句型（一）it用做形式主语或形式宾语：根据句子结构的需要，it用做形式主语或形式宾语，而真正的主语或宾语（to do 短语，doing短语，名词性从句）则放在句尾。
主要句型：It’s +形容词/名词+连词+名词性从句to do sth.doing sth.find / make / think / feel it +形容词/名词+连词+名词性从句to do sth。
doing sth。
例句:1. It will become more and more important to have a good knowledge of English 。
2。
It's usual for close friends to have similar ideas and beliefs 。
3。
It’s a pity that I didn’t think of it earlier。
4. It's no use going there so early.5。
Out teacher thinks it no good learning without practice。
6. Didn’t I make it clear to you that I was not coming ？7。
We found it strange that no one would take the money。
（二）其他句型1. It takes+时间段+sb.+ to do sth。
2。
表示“据说,据报道,/人们认为/相信/建议等It's said that……. It’s reported that ……It's believed/thought/suggested that……如：2. It is believed that the two children went off exploring（探险）on their own and get stuck on the cliff .3. It's suggested that we should have a meeting to discuss the problem 。
It 的 13 个常用句型及其运用!书面表达必备!
It 的13 个常用句型及其运用！书面表达必备！It 的13 个常用句型及其运用it 虽然并不显眼，但只要运用得当，也能在书面表达中发挥出巨大的作用，给人以高大上的感觉。
本文在归纳其常用的句式结构的基础上着眼于在书面表达中如何恰当地运用it 的相关句型，以达到优化句子，增加文章亮点。
01一、it 句型的归纳：( 一) it 作形式主语的 6 个句型句型1. It is + adj. (=of n.) + for sb. to do sth. / that... 某人做某事是……的。
Will it be convenient for you to start work tomorrow? 你明天开始工作方便吗?It is vital /of great significance for students to take regular exercise. = It is vital /of great significance that students should take regular exercise. 定期进行锻炼这对学生来说太重要了。
句型2. It is a shame / pity that... 很遗憾……(1) It is a shame that some students should scribble and litterrandomly on the campus. 一些学生竟然在校园中乱涂乱画，乱扔垃圾，这真是太不应该了。
(2) It is a pity that I cannot go to see the movie on Saturday evening. 很遗憾，周六晚上我没办法陪您去看电影了。
说明： that 引导的从句为主语从句，从句中谓语动词的语气分两种情况：①表述的内容是事实，用陈述语气 , 如例句 (2) ；②若内容表明说话人的一种语气 / 情感则使用虚拟语气 , 如例句 (1) 。
it的用法总结经典句型
it的用法总结经典句型1. “It’s time to do something”（是做某事的时候了）。
比如说：“It’s time to hit the sack!（是该睡觉的时候啦！）”，这就像是火车到了站点，该行动啦！2. “It takes somebody some time to do something”（某人花费多少时间做某事）。
像“ It took her a whole day to finish that painting.（她花了一整天来完成那幅画。
）”，就好像爬山一样，得一步步花费力气上去呀。
3. “It seems that...”（似乎……）。
比如“ It seems that he is angry.（似乎他生气了。
）”，这就如同天空的云，好像是某种形状，但又不是那么确定。
4. “It is said that...”（据说……）。
像“ It is said that there is a monster in that lake.（据说那个湖里有个怪物。
）”，就好像是流传的神秘故事一样吸引人。
5. “Make it +形容词”（使它变得……）。
例如“Let’s make it interesting.（让我们使它变得有趣。
）”，是不是如同给一幅画上色，让它鲜活起来呢？6. “Find it +形容词to do something”（发现做某事是……的）。
像“ I find it difficult to learn this language.（我发现学习这门语言很难。
）”，这和走一条崎岖的路一样，能感受到其中的不容易啊。
我的观点结论：掌握这些关于 it 的经典句型就如同拥有了一把钥匙，可以打开英语表达的各种奇妙之门，让我们在英语的世界里更加自如地交流和表达呀！。
It 的固定句型的总结
高中阶段关于It的常见固定句型的总结1. It be +adj.+ (for sb.) to do sth. (necessary, fundamental, important, vital, essential, significant, possible, impossible, difficult, hard, easy, convenient)It’s necessary for us to have a good knowledge of English.It is convenient for me to go to work from here.2. It be +adj.+ of sb. to do sth. (kind, cruel, clever, stupid, foolish, polite, rude, typical等表示逻辑主语性质，特征的词)It is cruel of them to kill the dogs.It is typical of her to keep others waiting long.3. It be +抽象名词+to do sth. (duty, hope, fact, fun, pity/shame, pleasure, honour, good/bad manners, one’s turn)It is fun to talk with him.It is bad manners to make fun of somebody’s appearance.It is your turn to answer the question.4. It be +adj.+ that-clause. (necessary, important, vital, essential, significant, natural, strange, essential, funny, 注意虚拟语气的使用)It is necessary that we (should) have a walk now.5. It be +possible/likely/probable + that-clauseIt is likely that she will ring me tonight.注意三者的区别It is possible (for sb.) to do sth.It is possible that-clauseIt is/seems probable that-clauseIt is likely that-clauseSb. is likely to do sth.6. It be +a pity/shame + that-clause (注意这种情况可以用虚拟语气也可以用陈述句语气)It is a pity that I can’t swim.It is a pity that you should lose a chance.7. It be + no/little wonder + that-clause (难怪…)a wonder that-clause (…真是令人奇怪)It comes as no surprise that-clause (难怪…)It is no wonder that she didn’t want to go to the party.8. It be +no good/use / of little use/good/useless + doing sth.It is no use crying over spilt milk.9. It be + just like sb. +to do sth. (某人恰恰就是这个样子)not like sb. + to do sth. (某人不是这个样子)It’s just like her to think more of others.10.It + be + done + that-clause. (said, believed, reported , proved, supposed, hoped, considered, thought, known, pointed out, must be admitted, accepted // suggested, advised, proposed required, asked, requested, ordered, directed, commanded, urged, desired 注意黑体词需用虚拟语气)It is reported that two scientists were killed in the accident.It is suggested that the meeting (should) be put off.11.It is (good/high) time for sth.It is (good/high) time to do sth.It is (good/high) time for sb. to do sth.It is (good/high) time that sb. did sth.It is (good/high) time that sb. should do sth.12. It will be (not)+ 时间＋before-clause.It was (not)+ 时间＋before-clause.It will be long before we will come back13.It be +段时间+ since +瞬时动词(自从…以来有多长时间)It be +段时间+ since +延续性动词(有多长时间没做…)It’s about three years since I moved here.It is a few years since I smoked14.It/This/That +is+ the first/second…time + sb. have done sth.It/This/That +was+ the first/second…time + sb. had done sth.It is the first time I have met such a great man.15.It be +时间+when 从句(时间是…)It was eight o’clock a.m. when the satellite was launched.16.It be+强调部分+that/who+其它成分注意：It be + not until…+that+ 其他成分17.It is up to sb. to do sth. (由某人负责某事)It’s up to us to give him all the help we can.18. It +(doesn’t )+ matter +that/when/whether…+…(有/没关系)It makes a difference that-clauseIt makes no difference whether/when/where/how…It doesn’t matter whether we go together or separately.19. It occurs to sb. /strikes sb. +从句20. It came about that-clause21. It + (so) happened+ that从句(碰巧)It happened that I saw him yesterday.22.It seems/appears that…注意：sb. seems to be…/to do sth. (注意动词不定式时态和语态的考查) It seems as if/as though…It seems that…There seems to be …It looks as if/as though…Sb. looks as if…It appears that…There appears to be…23. It takes sb. some time/some money to do sth.It takes some time/some money for sb. to do sth.24. It turns out / proves that…It turned out that he was not the kind of person we wanted.25. find/think/make/feel/consider…+ it + adj./n.+ to do sth. /doing sth. / that-clauseI made it clear/sure/certain that I was not interested in gardening.Cellphones make it possible/likely for us all to communicate at any time and from anywhere. She has made it a rule/habit/practice to read English aloud in the morning.I feel/think/find it a duty/a honor to help you with English.26. v.+ it + that/if/when…常见的有：hate/like it when…讨厌/喜欢某人做…see to it that…务必/确保/负责…depend/rely on it that…指望/依靠…appreciate it if…..如果……很感激I must see to it that you don’t catch a cold.I will appreciate it if you can give me a hand27.take it for granted that… (认为…是理所当然)owe it to sb. that… (把…归功于某人)。
It的特殊用法
It的特殊用法一、作形式主语1．（1）It’s + adj.+ to do sth.It’s important to study English well.(2 ) It’s + adj. +that…It’s important/ necessary/ likely/ possible/ certain/…that…It’s likely that he will win the game.It’s certain that he will come this afternoon.2. It’s + v-ed + that…(1) It’s said/ thought/ believed/ supposed/ reported/ proved/ known…that…It’s known that the earth travels round the sun.= As is known to everybody, the earth travels the sun.= What is known to everybody is that the earth travels the sun.(2) It’s suggested/ advised/ proposed/ requested/ required/ insisted/commanded/ demanded/ ordered/…that…It’s suggested that she（should）finish her homework this afternoon.It’s required that I (should) go at once.3. (1) It’s + 名+that…常见的名词有：a pity, a fact, an idea, an honor, no wonder等It’s a pity that he can’t come to the party.It’s a fact that he didn’t pass the exam.It’s a good idea that we’ll go outing.It’s an honor that I was invited to the meeting.(It’s)no wonder (that) he always takes the first place in the exams.(2) It’s + 名+doing常见的名词有：use, goodIt’s no use crying.It’s no good crying over spilt milk.【谚语】牛奶溢了，哭也没用。
It构成的句型小结
It构成的句型小结一、It作形式主语的句型为使句子平衡，往往把it置于句首作形式主语，而把真正的主语（通常是不定式短语、动名词短语或主语从句）移至句末。
It 作形式主语的句型有：㈠it 代指不定式短语的句型1. It takes + (sb.) + sometime / some money + to do sth.做某事花去某人多长时间Just a minute, it won't take me long to change. 等一下,我很快就可以换好衣服。
It takes five minutes to walk there. 走到那里需要5分钟。
It took me three days to prepare for the examination. 我花了三天准备那次考试。
It takes a lot of money to buy a house like that. 买那样一幢房子需要很多钱。
2.It takes + 名词+ (for sb.) to do sth. 某人做某事需要… …It took great imagination as well as patience for Annie to teach me to speak.对安妮来说，教我说话需要极大的信心和想象力。
It takes time for them to prepare for the great changes that take place in space.他们需要很多时间准备应付太空中所发生的巨大变化。
3.It is + 形容词+ (for / of sb.) to do sth. 某人做某事是… …的for sb. 的句型常用于表示事物的特征特点，表示客观形式的形容词，如easy, difficult, hard, important, possible, impossible, comfortable, necessary, better等。
It 句型小结
It 句型小结1.It is/was + 被强调部份+ who/ that + 句子的其它成份2. It be/become + adj./n. +(for sb.) + to do…/ that…3. It took/was/will take/will be + 一段时间+ before… 过多久才（就）…, …之后才…此句型中谓语动词多用过去时和将来时.4. It is time + for sth. / to do sth. / that … 该是…的时候了。
后接that从句时谓语动词常用过去式或should+动词原形5. It is the first/second…time (that) … 第一/二次…由于time前有序数词修饰，从句谓语动词常用完成时态，且和主句时态保持一致。
6.It looks/seems as if … 看起来好像…7. It is said/reported/thought/considered/believed/announced/expected… + to do…/that…据说/据报道/据认为/据相信/据宣布/据期望…8. It takes (sb.) some time to do sth. 做某事花费多少时间9. It is no use/good + doing sth. 做某事是没用/好处10. It seems/looks/appears/happens + that … 似乎/看起来/好像/碰巧11. think/make/believe/find/feel/consider+ it + adj./n. + to do/doing/that-clauseThere be句型的小结1. There used/seem/ happen/appear to be2. There is no sense in doing 做某事是没有用的，没有意义的3. There is no use /good doing 做某事是没有用的，没有必要的4. There is no need to do 没有必要做某事5. There is thought/said/reported to be 人们认为有/据说有/据报道有6. There is no doing（口语）不可能…….。
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It 构成的句型小结一、It 作形式主语的句型为使句子平衡，往往把 it 置于句首作形式主语，而把真正的主语(通常是不定式短语、动名词短语或主语从句)移至句末。
It 作形式主语的句型有：㈠ it 代指不定式短语的句型1. It takes + (sb.) + sometime / some money + to do sth.做某事花去某人多长时间Just a minute, it won't take me long to change. 等一下 ,我很快就可以换好衣服。
It takes five minutes to walk there. 走到那里需要 5 分钟。
It took me three days to prepare for the examination. 我花了三天准备那次考试。
It takes a lot of money to buy a house like that. 买那样一幢房子需要很多钱。
2. It takes + 名词 + (for sb.) to do sth. .................. 某人做某事需要It took great imagination as well as patience for Annie to teach me to speak. 对安妮来说，教我说话需要极大的信心和想象力。
It takes time for them to prepare for the great changes that take place in space. 他们需要很多时间准备应付太空中所发生的巨大变化。
3. It is + 形容词+ (for / of sb.) to do sth. 某人做某事是... 的for sb. 的句型常用于表示事物的特征特点，表示客观形式的形容词，如easy, difficult, hard, important, possible, impossible, comfortable, necessary, better 等。
of sb 的句型一般用表示人物的性格，品德，表示主观感情或态度的形容词，如kind, nice, stupid, rude, clever, foolish, thoughtful, thoughtless, brave, considerate( 考虑周到的), silly, selfish( 自私的) 等。
It was kind of you to help us. 谢谢你对我们的帮助。
What time would it be most convenient for me to call again? 什么时候我再给你打电话最合适？It 's very good of you to have listened to me. 感谢你能听我讲。
4. It is + 名词+ to do sth. 做某事是..... 的常用于该句型的名词有： manners, duty, fun, good, a great honour 等。
As a student, it is bad manners to come late to class. 作为学生，上课迟到是没有礼貌的。
It is our duty to pay taxes to our government. 向政府交税是我们的义务。
5. It is + one ' s turn + to do sth.轮到某人做某事It was my turn to clean the blackboard. 轮到我擦黑板了。
It is his turn to take the children to school. 今天该轮到他送孩子们上学了。
6. It is + up to sb. + to do sth. 做某事是某人的责任或义务It 's up to us to give them all the help we can. 我们理应竭尽所能地给予他们帮助。
It 's up to you to decide whether to go or not. 应该由你决定是否去。
Up to you! 由你来定！㈡ it 代指动名词短语的句型7. It is + 名词+ doi ng sth. 做某事是..... 用于该句型的名词有：no good, no use 等。
It 's no use talking to him about it. 和他谈论此事是没用的。
It 's no use/good (in) crying over spilt/spilled milk. 事已至此，后悔也无用。
(牛奶已泼，哭也没用。
)8. It + be + 名词 + that 从句用于该句型中的名词有： a pity, a shame, a fact, an honour, a wonder, a good thing, good news, no wonder 等。
惯用句型有：It is com mon knowledge that ........ 是常识It is a surprise that …令人惊奇的是It is a fact that …事实是....It is no wonder that …难怪...... (No wonder! 难怪呢)例如：It is a pity that she has made such a mistake 真遗憾，她犯了这样一个错误。
It's a pity that you should have to leave. 你非走不可真是件憾事。
It is a thousa nd pity/ thousa nd pities that he missed the cha nee. 他错过了这次机会真是太可惜了。
It is no won der that he has passed the exam in ati on. 难怪他考试及格了。
It is a shame that you have to leave so soo n. 你必须这么早离开，真遗憾。
It was a stupid thing that he didn ' t listen to his tea他不■听老师的话，真蠢。
It is a great honour that he receive that prize. 他得到了那个奖真是无上的荣耀。
10.lt + be + 形容词 + that从句.... 是......用于该句型中的形容词有：clear, obvious, true, certain」mporta nt, stra nge, n atural, surpris ing, fortun ate,good, won derful, funny, possible, impossible, likely, un likely, quite clear, unu sual 等。
惯用句型有：It is n ecessary that …有必要.......It is important that …重要的是 ...It is obvious that …很明显..........It is importa nt that we (should) learn En glish well. 我们学好英语是非常重要的。
It is n ecessary that the stude nts (should) remember all the new words. 学生记住所有的新单词是必要的。
11. It + be + -ed 分词 + that从句据... 是.... 的常见的过去分词有：said, reported, lear ned, announ ced, known, decided, expected, believed,con sidered, declared, felt, hoped, see n, supposed, thought, un derstood 等。
惯用句型有：It is said that …据说It is reported that …据报道It is believed that …大家相信It is hoped that …大家希望It is well known that ••众所周知It is thought that …大家认为It is suggested that …据建议It has bee n decided that ••大家决定It must be remembered that 务必记住的是It is reported that another man-made satellite has been put into orbit.据报道，又有一颗人造卫星被送入轨道。
It is said that he has go ne to the USA for further study. 据说他已去美国深造了。
It is known to all that the sun rises in the east. 众所周知，太阳从东方升起。
It has bee n decided that we should desig n the mach ine ourselves.已经决定我们自己来设计这部机器。
若sth/sb.做了主语则用下列句型：sth./sb. be said/ reported/ believed 等 +to do sth例如： Three thousa nd people were reported to die in the earthquake.据报道，三千人死于地震。
Ano ther hospital is said to be built next mon th. 据说下个月又一家医院要建。
12.lt +及物动词+名词+从句s foggy or 对我来说，天气有雾或晴朗没什么关系。
It doesn ' take any differenee to me whether he goes or not. 13.lt +不及物动词 + that 分句常见的不及物动词有： seem, happen, look ，turn out (结果，证明，原来)，occur 等。
惯用句型有：It seem s that … 似乎 ...It (so) happens (that) …(那么)碰巧 ......It occurred to_me that … 我突然想起 .....It seems that he is sick. (= He seems to be sick.) 看来他似乎有病。